Performance analysis of redundant safety-instrumented systems considering the imprecision of information in proof tests
Fragment książki (Rozdział monografii pokonferencyjnej)
MNiSW
5
spoza wykazu
| Status: | |
| Autorzy: | Zhang Aibo , Srivastav Himanshu , Barros Anne, Mazurkiewicz Dariusz, Liu Yiliu |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Strony: | 1 - 8 |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Abstrakty: | angielski |
| Safety-instrumented systems (SISs) are widely used to prevent hazardous events. The mechanical units of SISs can become vulnerable with time due to specific deterioration processes, which lead to a degrading system performance. Such phenomenon thus challenges the assumption of constant failure rate or exponentially distributed lifetime that the existing reliability analysis depends on. Meanwhile, redundant architecture is widely used to improve system availability and guarantee system performance meeting specific requirement, and periodic proof tests are executed to check system status. Given the unavoidable deterioration processes, an intermediate state of one unit can be observed to facilitate system performance analysis. Such a unit has three states according to the actual performance in proof tests, including working, degraded and failed states. This study aims to assess the performance of a 1-out-of-2 redundant system subject to degrading units. Different maintenance strategies are adopted to estimate system performance and cumulative maintenance cost, the two criteria in system lifecycle assessment after installation. A numerical example is conducted to illustrate the mentioned redundant system performance and maintenance strategies. |
